Hydraulic motion controlling governor or check



April 7, 1942-. E. DAVIS 2,279,160 HYDRAULIC MOTION CONTROLLING GOVERNOR OR CHECK Original Filed March 24, 1939 2 Sheets-Sheet l INV EN TOR.

A TTORNEYS.

E. DAVIS 2,279,160 HYDRAULIC MOTION CONTROLLING GOVERNOR OR CHECK A ril 7, 1942.

Original Filed March 24, 1959 2 Sheets-Sheet 2 FIG; 5

IHH

DAVIS;

8 5 W N T R S 0 E T YVN l N A t.- B. 0 2

FIG. 7A

Patented Apr. 7, 1 942 UNHTED STATES PATENT @FFICEf 7 Claims.

This invention relates to hydraulic governors, checks or motion controlling devices, and has for its object a hydraulic motion controlling governor or check for controlling or governing movement of an element or mechanism of a machine, apparatus, etc., in reverse directions, and providing a different control for the movement in one direction from in the other direction.

It further has for its object a hydraulic motion controlling governor or check including reversely movable plungers or pistons movable in parallel paths, one plunger or piston controlling the movement in one direction, and the other, the movement in the other direction, with adjustable means for individually adjusting the checking or governing movement of each plunger or piston.

It further has for its object a hydraulic governor in which the oppositely movable plungers or pistons are actuated by a rocking or reversely movable motion transmitting member interposed between the plungers and connectable to an actu ator on a machine or apparatus, the movements of which are to be controlled, governed or checked, and more specifically, plungers formed with racks on their opposing faces and meshing with a pinion at diametrically opposite sides thereof.

It further has for its object a hydraulic motion controlling governor or check consisting of a casing or reservoir with the movable plungers therein, which can be readily connectedto the machine or apparatus and the motion transmitting member readily coupled to the moving part of the machine, and also the adjustments readily made from the outside of the casing to control the checking effect.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like charac ters designate correspondin parts in all the views.

Figure 1 is an elevation of this hydraulic governor or check showing the same applied to a machine, as a garment and laundry pressing machine having an opening and a closing movement.

Figure 2 is an elevation of the hydraulic governor looking to the right in Figure 1, the pressing machine being omitted.

Figure 3 is a sectional view on line 33, Figure 2, the top or cap of the casing being removed.

Figure 4 is a sectional'view on line -l4, Figure 2, the contiguous portion or wall of the pressing machine being shown.

Figure 5 is an enlarged vertical sectional view taken substantially centrally of the check or on line 55, Figure 6.

Figure 6 is a sectional view taken on line 6-4, Figure 5, or on line 6 -45% Figure '7.

Figure '7 is a sectional view taken on line 1-1, Figure 5.

The invention is here shown as applied to a garment or laundry pressing machine, in which the headhas a closing movement from wide open position into closed position against a resilient padding on the lower pressing element or buck, and a reverse opening movement. The hydraulic governor is adjusted so that one plunger thereof controls. the closing movement and the other plunger, the opening movement, and in con-v trolling the closing movement, the press head is started with a minimum of checking'efiect to overcome the static inertia of the head and start it in motion, to gradually check its closing movement to avoid slamming, as the head quickly closes to a position near but out of contact with the lower pressing element or buck or the work thereon, and then with no, or with a minimum of, checking movement, while the head is going under final pressure on the work on the lower pressing element or buck and is compressingthe resilient padding. During the opening movement of the press, the other plunger permits a substantially uniform opening by checking the reaction of the resilient padding and of other parts under stress of the actuating mechanism, when the press starts to open, and then uniformly checking. during the opening movement. The various presses in accordance with their size, etc; require different adjustments and the same press may require difierent adjustments from time to time to suit conditions. ther movements would require other adjustments, and one of the features of this hydraulic check is the facility with which the adjustment can be made from the outside of the casing of the hydraulic governor.

This application is a division of .applicationof Ernest Davis, Serial Number 263,961, filed March 24, 1939.

l designates .apress head having an opening and a closing movement toward a lower pressing element or buck 2 having a resilient or spring padding 3 thereon, the buck 2 being supported on a bolster Or gooseneck Al on a table 5 supported by a hollow pedestal 5. The upper pressing element or head i is carried in any suitable manner by the usual head-carrying lever or yoke I having a swinging up and down movement. The head, i is power actuated by any suitable power mechanism including a toggle comprising links 8 and Q pivoted respectively at their ends to a fixed point and to a motion transmitting means which transmits the straightening movement of the toggle to the head I through the yoke 'l and being pivoted together by a pin or spindle at the joint! of the toggle. The pin H! is fixed to one of the links 8 or 9 so that the pin. or spindle ll) of the toggle rotates during folding and pin or spindle IE1 constitutes the actuator for the movable parts r plungers of the hydraulic governor.

closed position to prevent slamming; and closing the press under final pressure against the work on a resilient padding with practically no '3 checking effect. Therefore, the plunger I4, which controls-the closing movement, is provided with means for bringing about three different checkthe cylinders, pistons or plungers I4 or I5 work-- ing respectively in the chambers I2, I3, a rocking or reversely movable motion transmitting member mounted in the reservoir and operatively connected on opposite sides of its axis with the plungers I4, I5 respectively, a shaft on which the .ingefiects during the closing movement. This [means is here shown as a throttling pin 31 extending into -a lengthwise passage 38 in the plunger I5 and being of such contour or taper, as to vary the checking effect, as the plunger I4 is moved downwardly toward the lower end motion transmitting member is mounted, extending outside of the reservoir or casing for coupling to a movable part of the machine, in this instance, the pivot pin III of the joint of the toggle.

The upper portions-of the walls of the chambers I 2, I3 on their opposing sides are omitted at I6, and the plungers I4, I5 areprovided with racks I'I, I8 on their opposing sides.

The motion transmitting member is here shown as a pinion I9 meshing on diametrically opposite sides of its axis with the racks I1 and I8 respectively. -The pinion is mounted on a shaft 20 extending transversely into the reservoir and havinga coupling section 2I at its outer end for interlocking with a complemental coupling section II] on the joint or .pivot pin I0 of the toggle. the pedestal 6 in any suitable manner, as by bolts 23 with the shaft 20 extending through an.

The passages between the reservoir and the lower portions of the chambers I2, I3 .are provided in removable plugs or cages 26, 21 extending through the bottom of the casing II and threading into the heads at the lower ends of the chambers l2, I3, these cages being formed of the chamber or cylinder I2. The passage 38 has laterally extending ports 39 opening through the rack or the spaces between the teeth thereof for supplying a' lubricant to the rack and the pinion I9. The throttling pin 31 is here shown as mounted on the upper end of the cage 21.

. The throttling pin 31 is supported on the upper with a port 40 extending lengthwise thereof from The casing is suitably secured to a wall of the pressure face of the plunger, this permitting the flow of 011170 the rack of the plunger I5.

In operation, with the casing II applied to the machine, as for instance, as shown in Figures 1, 3 and 4, and the casing filled to the proper level with the oil of the desired consistency, during the closing of the press, the plunger I4 moves downward, and the plunger I5 upward. During the starting of the downward movement of the plunger I4, the oil flows with minimum resistance through the passage 29 of the cage 2'! into the reservoir and also up through the passage 38 and out through the ports 39. After the static inertia is overcome and the press head set in motion toward closed position, momentum of the with passages 29, 30 respectively, which open through lateral ports 3I, 32 into the casing II. These passages are controlled by individually adjustable valves here shown as balls or heads 33, 34 mounted on axially adjustable stems 35, 35

threading into the'cages 26,21 for adjusting the heads or balls 33, 34 different distances away from their seats, and thereby adjusting the size of the ports controlled by the balls 33, 34 through which the hydraulic fluid or-oil is passed from the chamber or cylinder I2, I3 back into the reservoir during the down or pressure stroke of the plunger I4 or I5. Thus, the checking effect of the plungers I4, I5 can be individually varied from the outside of the casing.

' As the machine to which this hydraulic governor is shown is a pressing machine in which the closing movement is controlled differently from the opening movement, at least one of the plungers I4, I5 is shown as provided with means for adjusting the checking efiect thereof difierently from the other. In the illustrated embodiment of the invention, the plunger I4 effects the checking of the presshead I during its closing movement, and the plunger I5 effects the checking during the opening movement. As beforev pointed out, the closing movement embodies three different stages: (a) overcome the static inertia to start the head in motion and'get it under momentum. This with practically no or very little checking effect. (b) gradually checkhead is checked by the throttling pin 31, due to the fact that the plunger moves along the throttling pin,until the tapered portion 3'! thereof enters the passage 38 and thus throttles the free flow of oil through the passage 38, so that now the only outlet for the passage is through the passage 29 of the cage or plug 21 back into the reservoir past the head or ball 33, this having been initially adjusted to a predetermined open position by means of the stem 35. During the opening of the press, the plunger I4 moves retrogradely or upwardly, and the plunger I5 moves downwardly, the oil passing during this down- Ward or pressure stroke through the port 40 substantially uniformly throughout the entire stroke and also through the passage 30 of the cage 21 past the. ball 34, which is individually adjustable'a predetermined distance from its seat so as to be always open a predetermined amount, and this initial adjustment can be varied, if desired, by adjusting the stem 36.

What Iclaim is:

A hydraulic governor comprising a reservoir for hydraulic fluid provided with a pair of upright chambers, plungers working in the chambers, the upper portions of theopposing sides of the chambers above thelevel of the pressure faces of the plungerswhen the latter are at the limit of their"up strokes opening into the reservoir, the plungers being formed with racks ing the press head while it is moving to nearly on their opposing sides, a shaft extending transversely into the reservoir between the racks and having means for connection to a rocking actuator, a pinion mounted on the shaft'within the reservoirand meshing on opposite sides of its axis with the racks, and passages for the hydraulic fluid communicating with the lower portions of the chambers respectively, one of the plungers being formed with an internal lengthwise passage opening through the pressure face thereof, and a lateral passage opening through the side thereof on which the rack is provided.

2. A hydraulic governor comprising a reservoir for hydraulic fluid provided with a pair of upright chambers, plungers working in the chambers, the upper portions of the opposing sides of the chambers above the level of the pressure faces of the plungers when the latter are at the limit of their up strokes opening into the reservoir, the plungers being formed with racks on their opposing sides, a shaft extending transversely into the reservoir between the racks and having means for connection to a rocking actuator, a pinion mounted on the shaft within the reservoir and meshing on opposite sides of its axis with the racks, and passages for the hydraulic fluid communicating with the lower portions of the chambers respectively, the plungers being formed with passages opening through the pressure faces thereof and also through the plungers in the rear of the pressure faces toward the sides of the plungers provided with the racks.

3. A hydraulic governor comprising a reservoir for hydraulic fluid provided with a pair of upright chambers, plungers working in the chambers, the upper portions of the opposing sides of the chambers above the level of the pressure faces of the plungers when the latter are at the limit of their up strokes opening into the reservoir, the plungers being formed with racks on their opposing sides, a shaft extending transversely into the reservoir between the racks and having means for connection to a rocking actuator, a pinion mounted on the shaft within the reservoir and meshing on opposite sides of its axis with the racks, and passages for the hydraulic fluid communicating with the lower portions of the chambers respectively, one of the plungers being formed with an internal lengthwise passage opening through the pressure face thereof, and a lateral passage opening through the side thereof on which the rack is provided, and a throttling pin extending lengthwise of said passage and being of a contour to vary the flow of fluid throughthe passage as the plunger progresses on its down stroke.

4. A hydraulic check comprising a casing formed with a reservoir and with a pair of upright chambers communicating at their lower ends with the reservoir, plungers reciprocally movably in saidchambers respectively, and reversely movable relatively to each other, the chambers opening into the reservoir at their upper portions above the level of the pressure faces of the plungers when the latter are at the limit of their up strokes and the plungers having passages opening through their pressure faces and also opening into the upper portion of the reservoir, a reversely movable actuator mounted in the casing and having means for connection to a prime mover to be actuated thereby, motion transmitting means between the actuator and the plungers to move the plungers reversely relatively to each other, the actuator being a shaft extending transversely between the plungers, motion transmitting means including a gear mounted on the shaft and meshing with racks provided on opposing sides of the plungers, the plungers being formed with passages opening through their pressure faces and through the plungers in the rear of the pressure faces toward the sides of the plungers on which the racks are located, and a throttling pin extending in the passage of at least one of said plungers.

5. A hydraulic governor comprising a reservoir for hydraulic fluid provided with a pair of upright cylinders, plungers working respectively in the cylinders, a reversely movable motion transmitting member mounted between the plungers and operatively connected to the plungers to'reciprocate the same oppositely to each other and having means for connection to an actuator, the cylinders having heads at their lower ends, the heads being spaced from the bottom of the reservoir, a cage separable from the reservoir and the cylinder and placeable in and removable from operative position from the outside of the reservoir and extending through the bottom of the reservoir into the head of each cylinder and provided with a passage communicating with the interior of the reservoir, and with ports opening into the cylinder, thereby providing passages connecting the reservoir and the cylinders.

6. A hydraulic governor comprising a reservoir for hydraulic fluid provided with a pair of upright cylinders, plungers working respectively in the cylinders, a reversely movable motion transmitting member mounted between the plungers and operatively connected to the plungers to reciprocate the same oppositely to each other and having means for connection to an actuator, the cylinders having heads at their lower ends, the heads being spaced from the bottom of the reservoir, a cage separable from the reservoir and the cylinder and placeable in and removable from operative position from the outside of the reservoir and extending throughthe bottom of the reservoir, and into the head of each cylinder and provided with a passage communicating with the interior of the reservoir, and with ports opening into the cylinder, thereby providing passages connecting the reservoir and the cylinders, and a valve for controlling the passage of the cage having means extending outside of the cage to initially adjust the valve different distances from its seat.

7. A hydraulic governor comprising a reservoir for hydraulic fluid provided with a pair of upright cylinders, plungers working respectively in the cylinders, a reversely movable motion transmitting member mounted between the plungers and operatively connected to the plungers to reciprocate the same oppositely to each other and having means for connection to an actuator, the cylinders having heads at their lower ends, the heads being spaced from the bottom of the reservoir, a cage extending through the bottom of the reservoir into the head of each cylinder and provided with a passage communicating with the interior of the reservoir, and with ports opening into the cylinder, thereby providing passages connecting the reservoir and the cylinders, and a valve for controlling the passage of the cage having means extending outside of the cage to initially adjust the valve different distances from its seat, one of the plungers being formed with a lengthwise passage opening through its pressure face and also communicating at its upper end with the reservoir, and a throttling pin supported by the cage and extending into the last-named passage.

ERNEST DAVIS. 

